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Columbus P-70 Ultra – External Antenna Reference Point (ARP)

For users who need centimeter-level RTK positioning accuracy, it's important to know the exact reference point of the P-70 Ultra's external antenna.

According to the Columbus engineering team, the Antenna Reference Point (ARP) is located at the horizontal center of the antenna, approximately 6.3 mm above its bottom surface.

Please refer to the attached diagrams for the exact location.

This information is particularly useful for surveying applications where accurate antenna height measurements and positioning offsets are important.